A fast Fourier-plane analysis pipeline has been developed
for the Cosmic Background Imager (CBI) project. The
interferometer visibilities are pre-gridded into a set of
estimators that are constructed on a lattice in the uv
plane. The correlations between these estimators are used as
the basis for a maximum likelihood reconstruction of the
power spectrum of the intensity fluctuations seen on the
sky. This technique has been shown to be efficient and
robust, and can deal with large mosaics of fields such as
those produced by interferometers measuring the Cosmic
Microwave Background Radiation (CMBR) such as the CBI. This
pipeline can also produce optimally filtered images from the
estimators, and can deal with polarization data as well. We
describe this novel method, and show results for simulated
datasets as well as real results from the CBI. The
scientific results highlighted include the recently released
CBI deep-field and mosaic power spectra of the CMBR which
cover the multipole range from \ell=300--3000. We also
emphasize the use of the CBI pipeline for the analysis of
polarization interferometry data, with particular
application to the CBI polarization upgrade currently
underway.